The best soup!

I have to share the recipe of the best soup! It is my favorite and my family's favorite as well. It's called Wisconsin Cauliflower soup, don't let the cauliflower part be deceiving you can't really taste it. Here is the recipe, make it and give me feedback. I can promise you will enjoy it!

2 tbsp. butter
1 med. onion, chopped
1/4 c. flour
1/2 tsp. salt
2 c. milk
1 1/2 c. water
1 can chicken broth (13-14 ounces)
1 head cauliflower, cut
1 tsp. dijon mustard
1 c. sharp cheddar cheese, shredded
1 c. colby jack cheese, shredded

In a large saucepan melt butter, add the onion and cook 10 min. Whisk in flour and salt, then gradually stir in milk, chicken broth, and water. Add cauliflower, bring to boil. Reduce heat, simmer 15 min. Blend cauliflower mixture on low till smooth texture. Return mixture to saucepan, boil then stir in mustard and cheese. Serve while hot!

P.S. It's also really good as leftovers for the rest of the week!